ok 2 of my plants were over nuted for about a week. i changed water with lower ppms and am seeing the top leaves curl downward, now was i supposed to have gave the plants no nutrients for any amount of time to flush the plant or was i alright with just switching out the nutrient solution?i am using 7 mil per gallon of pure blend pro 7 mil pg of hygrozyme 10 mil per gallon liquid karma. ill post some pics when the light comes on all answers are appreciated thanks